What Size Posts Should I Use For A Deck?

Should I use deck boards or 2×6?

2×6 is thicker and is stronger, but is also more expensive.

Spacing between deck boards provide a few critical functions.

The primary function is to drain water from the deck.

Gaps that are narrow (1/8”), can catch debris, specifically on top of the joists, and can be difficult to clean out..

How many posts do I need for a 12×16 deck?

A standard deck will need four footings parallel to the house, but they will need to be temporarily braced by 6 inch-by-6 inch posts. Using doubled boards, you will then need to build beams on the top row of the posts to frame the edges of the deck.

Should I use 4×4 or 6×6 deck posts?

4×4 post will be fine. I have built many decks for new homes with them. 6×6 is more sturdy of course and will not twist as easy, but for structure purposes, 4×4 will be fine.

How many posts do I need for a 10×20 deck?

The larger 12-foot side will have a post spacing of 6 feet at a minimum code requirement. That makes a total of eight posts that need to be installed on this average size deck.

Why deck posts should not be set in concrete?

Concrete tends to absorb moisture and wood expands when it gets wet, so these two factors combined will result in the wood breaking the concrete. By setting the post on top of footing, you’re creating a solid foundation for the deck to stand on.

How far can a 2×6 decking span without support?

How far can a 2×6 Rafter span without support? The table states that 2 X 6 rafters spaced 16 inches on center (o.c) can span a maximum distance of 13 feet 5 inches.

How deep does a post need to be for a deck?

Dig the holes six inches deeper than the required frost line depth for your area, and slightly wider than the concrete footer tubes you’ll be using.

Can I use 2×6 for deck joists?

In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet. … 2×6 joists should only be used on ground-level decks that do not require, and will not provide for, any guards.

Can I use 4×4 posts for my deck?

In the past, many decks were built with 4×4 support posts (also called structural posts). But these can bow seriously, even if a deck is only 3 feet off the ground. For that reason, we strongly recommend that you use 6x6s instead, even if your building department does not demand them.

What is the best way to set deck posts?

There are several ways to set deck posts; we recommend attaching the posts to concrete footers above the ground. This helps to prevent wooden posts from rotting. Set footers a minimum of 6” below the frost line for your area to prevent movement during freezing temperatures.

How much weight can a 2×6 deck support?

The type of load in question will also determine how much weight a 2×6 can hold on edge. For example, a 2×4 lumber may hold a 4-cylinder engine comfortably but may not hold a bigger one. On the other end, a 2×6 can support a V8 engine of between 600 – 700 lbs.